A Answers (4)
The first way is that tooth decay, if left alone, will eventually cause a cavity. This is almost always the starting point. And hopefully, it ends there (e.g.: taking care of the cavity with a filling). But if the cavity is not handled and the tooth decays further, the tooth could weaken and break, and/or an infection/abscess could form. The infection could then spread, causing a myriad of health complications (too many to list here). So the common equation becomes tooth decay leads to cavities which leads to infection which leads to… well, at that point, you really need to see your dentist.
Tooth decay can affect your body. At first your tooth may be sensitive and you may avoid eating certain foods which would affect your nutrition. Left untreated the decay can cause pain in the tooth leading to a loss of concentration and loss of sleep at night which can affect your performance at work and at school. The decay can also cause the tooth to abscess leading to an infection. The infection can spread throughout your body causing flu like symptoms. The infection can also necessitate the need for the tooth to be extracted and maybe the surrounding teeth. In rare instance, the infection can spread to the brain causing death. Regular visits to the dentist are important to diagnose and treat tooth decay.